IDEC MICROSmart FC6A Series Ladder Programming Manual page 365

Settings
■ Devices tab
2.
1.
1. Select instruction
This item selects which ABS instruction to use ("ABS1", "ABS2", "ABS3", or "ABS4").
The absolute position counter to be initialized differs with the instruction.
Command Absolute Position Counter
ABS1 Absolute Position Counter 1
ABS2 Absolute Position Counter 2
ABS3 Absolute Position Counter 3
ABS4 Absolute Position Counter 4
*1 The upper and lower data registers change according to the 32-bit data storage method specified. For details, see "32-bit Data Storage" on
page 3-9.
*2 The values of the absolute position counters are retained by the backup battery even when the power is turned off. When a keep data error
occurs, the values are initialized to 0.
*3 The special data registers are read only. To change the values of D8240 to D8247, use the ABS instruction.
*4 When the RAMP, ARAMP, ZRN, and JOG instructions are used with Reversible control disabled, the absolute position counters are not
updated.
*5 When specify absolute position mode is enabled in the RAMP instruction, the target position is specified as the absolute position. When using
specify absolute position mode in the RAMP instruction, initialize the corresponding absolute position counter in advance with the ABS
instruction. For details, see "RAMP (Trapezoidal Control)" on page 18-15.
The initialized status of D8240 to D8247 can be checked with the absolute position counter initialized flags defined in D8239
(absolute position control status).
When the FC6A Series MICROSmart switches from stop to run, 0 (not initialized) is stored in the absolute position counter
initialized flags. Then when the absolute position counters are initialized using the ABS instruction, 1 (initialized) is stored.
Device Number
D8239 Absolute Position Control Status
Special Data
Register
High word D8240
Low word D8241
High word D8242
Low word D8243
High word D8244
Low word D8245
High word D8246
Low word D8247
Parameter Name
FC6A S MICROS
ERIES MART
Description
*1*2*3
-2147483648
to
2147483647
Bit Position
bit0: Absolute Position Counter 1 Initialized Flag
bit1: Absolute Position Counter 2 Initialized Flag
bit2: Absolute Position Counter 3 Initialized Flag
bit3: Absolute Position Counter 4 Initialized Flag
bit4 to bit15
L P M
ADDER ROGRAMMING ANUAL
18: P O
ULSE UTPUT
Instructions that Update the Absolute
Position Counter
*5
ABS1/RAMP1 /ARAMP1/ZRN1/JOG1
*5
ABS2/RAMP2 /ARAMP2/ZRN2/JOG2
*5
ABS3/RAMP3 /ARAMP3/ZRN3/JOG3
*5
ABS4/RAMP4 /ARAMP4/ZRN4/JOG4
Description
0: Not initialized
1: Initialized
Reserved
FC9Y-B1726
I
NSTRUCTIONS
*4
18-69